Brush-holder for electric motors or the like.



No. 863,683. PA'IENTED AUG. 20, 1907. T. s. WATSON. BRUSH HOLDER FORELEGTRIGMOTORS OR THE LIKE.

APPLICATION FILED SEPT. 1,1906.

THOMAS S. WATSON, OF MILWAUKEE, WISCONSIN.

BRUSH-HOLDER FOR ELECTRIC MOTORS OR THE LIKE.

Specification of Letters Patent.

Patented Aug. 20, 1907.

Application filedlseptember 1,1906. Serial No. 332,999.

To all whom it may concern:

Be it known that I, THOMAS S. WATSON, a citizen of the United States,and a resident of Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented certain new and useful Improvements inBrush-Holders for Electric Motors or the Like, and I do hereby declarethat the following is a full, clear, and exact description thereof.

The object of my invention is to provide a simple and effective carbonbrush and holder for electric motors or dynamos, wherein provision ismade for adjusting members of said holder so that the carbon is firmlyheld against side-play or wabble in its seat, while being held incontact with the commutator, the arrangement being such that the carbonat the same time is free to be moved through the holder in order to takeup wear.

Said invention consists in certain peculiarities of construction andcombination of parts as hereinafter fully set forth with reference tothe accompanying drawings and subsequently claimed.

In the drawings: Figure 1 represents a plan section view of a carbonbrush and brush holder made in accordance with my invention, the sectionbeing indicated by line 1 1 of Fig. 2, Fig. 2, a sectional elevation ofsame as indicated by line 22, Fig. 3, a cross-section of the holder asindicated by line 3-3 of Fig. 2, and Fig.4, a detail side elevation ofone of the brush-holder jaws.

Referring by letter to the drawings, A, A indicate brush-holder jawsprovided with split shanks B having squared openings O, and a pair ofear-extensions D, the squared openings being adapted to fit over asimilarly squared stud E of a brush supporting bracket not shown.

Each jaw A, A, is held in its lateral adjustment upon the stud E-by aclamping screw F in threaded connection with the pair of ears.Interposed between the jaw members and mounted upon the stud E is asleeve G, which sleeve is provided with a squared opening to receive thestud, and a forward lug H, of the sleeve serves as a support for a postI, carrying a looped tension spring I, having its free end arranged toeXert pressure upon the carbon.

The brush holder jaws terminate in forward inturned parallel ways K,having tongues a that are of bevel or taper face in cross-section, forthe reception of a carbon block L, provided with corresponding bevel ortaper face grooves 11, which block as previously stated, is held incontact with a commutator ring by spring I, as best shown in Fig. 2 ofthe drawings. The spring J is adjustable as to tension by means of nuts0, d, in threaded connection with the post I, the looped end of saidspring being confined between flanges N, of the jaws, and thereby heldagainst side play.

It will be understood from the foregoing description that various widthsof carbon may be inserted into the holder by suitable adjustment, whichpermits an accurate but easy sliding fit of said carbon upon the ways,an essential feature to the operation of a perfect holder of the classto which my invention pertains.

While I have shown and described a carbon brush holder, wherein thecentral sleeve portion for supporting the post is separate from thejaws, it is obvious that the same may be integral with one of said jawswithout departing from the invention, it being also within the scope ofmy invention to substitute a round stud for the square one shown, and inplace of the tongue and groove connection for guiding the carbon shown,other forms of equivalent construction may be used.

I claim:

1. A carbon-brush holder for electric motors or generators, the samecomprising jaws having oppositely disposed parallel ways that aretapered in cross-section to form guides, and the brush having taperedges corresponding to said guides with which they are engaged.

2. A carbon-brush holder for electric motors or generators, comprisingjaws having oppositely disposed paral.

lel ways, said ways being tapered in erosssection to form guides forcorrespondingly shaped tapered edges of a carbon, and means forregulating the set of the jaws, whereby a simultaneous lateral andtransverse adjustment of the carbon with relation to said ways isobtained.

3. A carbon-brush holder for electric motors or generators, comprisingjaws having oppositely disposed paral lel ways for engagement with thecarbon, means for ad justing the set of the jaws with relation to eachother.

4. A carbon-brush holder for electric motors or generators, comprisingjaws having oppositely disposed parallel ways for engagement with thecarbon, supporting means for the jaws, means for adjusting and holdingsaid jaws with relation to each other upon their support, and a springin connection with the holder adapted to exert pres sure upon the carbonin a direction parallel with the ways of said jaws.

5. A carbon-brush holder for electric motors or generators, comprising abrush-holder support, jaws mounted upon the support, means for adjustingthe jaws with relation to each other, a carbon in tongue-and-grooveconnection with the jaws, and a spring in connection with the holderadapted to exert pressure upon the carbon in a direction parallel to thetongue-andgroove connection between said carbon and jaws.

G. A carboubrush holder for electric motors or generators, comprising asupporting stud, non-rotatable jawmembers adjustably mounted thereof,oppositely disposed tongues extending from the jaws, a'grooved carbonarranged to engage the tongue, a non-rotatable sleeve mounted on thesupporting stud between the jaws, a post extending from the sleeve, andan adjustable tensionspring carried by the post for engagement with thecarbon.

In testimony that I claim the foregoing I have hereunto set my hand atMilwaukee in the county of Milwaukee and State of Wisconsin in thepresence of two witnesses.

THOMAS S. WATSON.

Witnesses Gno. W. YOUNG, N. E. OLIPHANI.

